Перепишите и письменно переведите предложения с модальными глаголами и их эквивалентами.

Перепишите и письменно переведите предложения с модальными глаголами и их эквивалентами. 1. Polymers can be used for making different things. 2. Energy is never destroyed: one form of energy may be converted into another. 3. They will be able to improve the experimental conditions in their laboratory. 4. This complicated process must result in the release of energy. 5. The mixture is to be heated before the experiment. 6. The laboratory assistant had to alter the experimental conditions.